MAX1559 Datasheet, PDF (6/14 Pages) Maxim Integrated Products – 5-Output Power-Management IC For Low-Cost PDAs

5-Output Power-Management IC For
Low-Cost PDAs
Typical Operating Characteristics (continued)
(Circuit of Figure 1, T_A = +25°C, unless otherwise noted.)
3.50
3.25
3.00
2.75
2.50
2.25
2.00
1.75
1.50
0
SDIG OUTPUT VOLTAGE
vs. LOAD CURRENT
100 200 300 400 500 600
I_LOAD (mA)
COR1 OUTPUT VOLTAGE
vs. LOAD CURRENT
1.2
1.0
0.8
0.6
0.4
0
100
200
300
400
I_LOAD (mA)
2.00
1.75
1.50
1.25
1.00
0.75
0.50
0
COR2 OUTPUT VOLTAGE
vs. LOAD CURRENT
10 20 30 40 50
I_LOAD (mA)
LOAD STEP RESPONSE (MAIN)
MAX1559 toc07
V_MAIN
0V
AC-COUPLED
50mV/div
LOAD STEP RESPONSE (COR1)
MAX1559 toc08
V_COR1
0V
AC-COUPLED
20mV/div
0A
I_LOAD
100mA/div
40µs/div
0A
I_LOAD
100mA/div
40µs/div
INPUT CURRENT
vs. INPUT VOLTAGE
125
V_IN FALLING
V_IN RISING
100
LCD SWITCH WAVEFORM
MAX1559 toc10
V_IN
0V
AC-COUPLED
20mV/div
75
50
0V
L_X
10V/div
25
0
0
1
2
3
4
5
V_IN (V)
0V
LCD
AC-COUPLED
20mV/div
2µs/div
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